| // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "sandbox/src/resolver.h" |
| |
| #include "sandbox/src/sandbox_nt_util.h" |
| |
| namespace { |
| |
| const BYTE kPushRax = 0x50; |
| const USHORT kMovRax = 0xB848; |
| const ULONG kMovRspRax = 0x24048948; |
| const BYTE kRetNp = 0xC3; |
| |
| #pragma pack(push, 1) |
| struct InternalThunk { |
| // This struct contains roughly the following code: |
| // 00 50 push rax |
| // 01 48b8f0debc9a78563412 mov rax,123456789ABCDEF0h |
| // 0b 48890424 mov qword ptr [rsp],rax |
| // 0f c3 ret |
| // |
| // The code modifies rax, but that should not be an issue for the common |
| // calling conventions. |
| |
| InternalThunk() { |
| push_rax = kPushRax; |
| mov_rax = kMovRax; |
| interceptor_function = 0; |
| mov_rsp_rax = kMovRspRax; |
| ret = kRetNp; |
| }; |
| BYTE push_rax; // = 50 |
| USHORT mov_rax; // = 48 B8 |
| ULONG_PTR interceptor_function; |
| ULONG mov_rsp_rax; // = 48 89 04 24 |
| BYTE ret; // = C3 |
| }; |
| #pragma pack(pop) |
| |
| } // namespace. |
| |
| namespace sandbox { |
| |
| size_t ResolverThunk::GetInternalThunkSize() const { |
| return sizeof(InternalThunk); |
| } |
| |
| bool ResolverThunk::SetInternalThunk(void* storage, size_t storage_bytes, |
| const void* original_function, |
| const void* interceptor) { |
| if (storage_bytes < sizeof(InternalThunk)) |
| return false; |
| |
| InternalThunk* thunk = new(storage, NT_PLACE) InternalThunk; |
| thunk->interceptor_function = reinterpret_cast<ULONG_PTR>(interceptor); |
| |
| return true; |
| } |
| |
| NTSTATUS ResolverThunk::ResolveTarget(const void* module, |
| const char* function_name, |
| void** address) { |
| // We don't support sidestep & co. |
| return STATUS_NOT_IMPLEMENTED; |
| } |
| |
| } // namespace sandbox |